Coleoid beaks from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, SW Germany) Klug, Christian ; Schweigert, Günter ; Dietl, Gerd ; Fuchs, Dirk Abstract Publication: Lethaia Pub Date: September 2005 DOI: 10.1080/00241160510013303 Bibcode: 2005Letha..38..173K